This site is intended as a tool for personnel working within the Military Health
System, although anyone with an interest may access. It contains no personal health
or identifying information. It allows queries that detail current and historical
associations between the following data elements:
ZIP Codes: Active and discontinued CONUS, U.S. Territory, and Overseas Military
TRICARE Health Care Service Region: North (i.e. 17), South (i.e. 18), West (i.e.
19)); Former Lead Agent Regions (i.e. 1-12, AK)); Territories (i.e. 14, 15, PR);
NOTE: the official geographic definition of any TRICARE Region is found in the Managed
Care Support Contract for that region. Region information on this site represents
our best attempt to describe these contractual region definitions and should not
be represented as official. Whenever a discrepancy in region definition exists between
this data and the regional contract, the contract always takes precedence.
Military Treatment Facilities (MTF): Current and Former Inpatient MTFs – MTFs are
represented by Defense Medical Information System Identification (DMIS ID) numbers
(for detailed information about DMIS IDs, visit the DMIS ID Table Home at http://www.tricare.mil/tma/gri).
Catchment Area: Defined as a health care market area surrounding one or more MTFs.
The catchment area identified in this data consists of a 40 mile radius (i.e. market
area) around a current or former inpatient MTF. If the straight line distance from
the MTF to a ZIP’s center is 40 miles or less, the ZIP is defined as a catchment
ZIP within the MTF’s market area and associated with the MTF’s DMIS ID number. If
a ZIP’s center is not within 40 miles of any active inpatient MTF, it is defined
as non-catchment and associated with a state non-catchment DMIS ID. Historical information
identifies ZIPs that used to be catchment when the MTF was active.
Appropriate Uses / Interpretation of Results:
“On October 1, 2013, the Department of Defense established the Defense Health Agency (DHA) to manage the activities of the Military Health System. These activities include those previously managed by TRICARE Management Activity (TMA), which was disestablished on the same date. During the next several months, all TMA websites will change to reflect the new DHA. We appreciate your patience during this transition."
7700 Arlington Boulevard, Suite 5101, Falls Church, VA 22042-5101
The appearance of hyperlinks to external Web sites does not constitute
endorsement by the Defense Health Agency of these Web sites or the
information, products or services contained therein. For other than
authorized government activities. The Defense Health Agency does not
exercise any editorial control over the information you may find at other
locations. Such links are provided consistent with the stated purpose of
this DoD Web site. Accessibility/Section 508